JPS61272575A - Refrigerator with high-frequency heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a refrigerator equipped with a high-frequency heating device for defrosting frozen foods.

BACKGROUND OF THE INVENTION In recent years, the frequency of use of frozen foods in households has increased, and along with this, refrigerator-freezers capable of storing frozen foods have become widespread. Recently, refrigerators with a quick-freezing function have been developed, allowing foods to be frozen quickly and stored for long periods of time while maintaining freshness, and so-called home freezing has become popular.

Now, before cooking frozen foods, you need to thaw them.

Currently, in general households, thawing is done naturally (defrosting by leaving it to stand naturally), by thawing by water (defrosting by leaving it in water), and by using a microwave oven, but the thawing time is limited.

Therefore, various refrigerators with high-frequency heating devices have been proposed that enable rapid thawing with good thawing quality by installing a high-frequency heating device inside the refrigerator.

An example of the above-mentioned conventional refrigerator with a high-frequency heating device will be described below with reference to the drawings.

Figure 2 is a cross-sectional view of a conventional refrigerator with high-frequency heating device;
The figure shows an electrical circuit diagram.
The refrigerator has a refrigerator compartment 2 and a freezer compartment 3, and a thawing compartment 4 is installed inside the refrigerator compartment 2.

Microwaves are supplied to the defrosting chamber 4 from a high frequency generator 5 installed in a machine room at the bottom of the refrigerator 1 through a waveguide 6 which is a transmission line.

Further, 7 is a fan that causes forced convection of cold air into the refrigerator compartment 2, the freezing compartment 3, and the thawing compartment 4.

Next, in FIG. 3, 8 is the electric circuit of the refrigerator. The electric circuit 8 of this refrigerator connects a compressor 12 to a commercial AC power source 9 via an internal temperature regulator 1o that closes when the internal temperature reaches a predetermined temperature and a cam-type defrost timer 11, which will be described later. ing. Further, 11 is a defrost timer for switching control between cooling operation and defrosting operation, and its normally open contact a is connected to a defrosting heater 15 of the cooler 14 via a bimetal thermostat 13;
A cold air forced convection fan motor 17 is connected to the normally closed contact point of the compressor 12 in parallel to the compressor 12 via a switch 1e that opens the contact point when the refrigerator compartment door is opened. Next, the high frequency generation circuit 18 will be described. 19 and 20 are double switches installed on the defrosting chamber door to prevent radio wave leakage. The switch 19 is connected to the normally closed contact bVC of the defrosting timer 11, and the switch 20 is connected to the power source 9. Reference numeral 21 denotes a defrosting control circuit, which is connected to the normally closed contact of the defrosting timer 11 via the switch 19 and to the power source via the switch 20. 22 is a high frequency generator.

The defrosting control circuit 21 controls the operating time of the high frequency generator.

The operation of the refrigerator with a high-frequency heating device configured as described above will be described below.

First, the defrosting time is set by the defrosting control circuit 21, and when the defrosting switch (not shown) is turned on, the high frequency generator 22 is energized and microwaves are generated, which propagate through the waveguide 6 and enter the defrosting chamber 4.
is guided to irradiate the frozen food in the thawing chamber 4 to thaw the food. When the defrosting chamber door is opened during defrosting, switch 19
Then, the switch 20 is turned OFF, stopping power supply to the high frequency generator 22, stopping oscillation, and preventing leakage of radio waves.

Problems to be Solved by the Invention However, in the above configuration, a separate switch is required in addition to the switch in the high frequency generation circuit as a double safety device that operates only by opening and closing the door to prevent leakage of radio waves to the outside of the thawing room and the outside of the refrigerator room. The problem was that it required the installation of

In view of the above-mentioned problems, the present invention provides a refrigerator with a high-frequency heating device that uses a switch as a double safety device for preventing battery leakage that operates only by opening and closing the door.

Means for Solving the Problems In order to solve the above problems, the refrigerator with a high frequency heating device of the present invention opens and closes the contacts of a switch provided in the thawing chamber door section in conjunction with the opening and closing of the thawing chamber door to open the door. There is a switch that sometimes stops the oscillation of the high-frequency generator, and a switch that opens and closes the contacts of the switch in conjunction with the opening and closing of the door, which is installed on the door of the refrigerator compartment.When the door is opened, the fan motor of the cold air circulation fan and the high-frequency generator oscillate. The switch that stops the oscillation is a dual oscillation stop device.

Operation The present invention has a dual oscillation stop device with the above-described configuration, and eliminates the need for a conventional separate switch.

EXAMPLE Hereinafter, a refrigerator with a high-frequency heating device according to an example of the present invention will be described with reference to the drawings.

FIG. 1 shows an electric circuit of a refrigerator with a high-frequency heating device according to an embodiment of the present invention. The installation positions of the refrigerator main body, thawing chamber, and high frequency generator are the same as in the conventional example. A normally open contact a of a defrost timer 11 that switches between cooling operation and defrosting operation is connected to a cooler 1 via a bimetal thermostat 13.
The defrosting heater 16 of No. 4, the normally closed contact of the compressor 12, and the fan motor 17 for forced convection of cool air via the switch 16 that opens the contact when the refrigerator compartment door is opened in parallel with the compressor 12.
is connected. Next, the high side wave generating circuit 18 will be described. A switch 19 is installed on the thawing chamber door and opens its contacts when the thawing chamber door is opened, and is connected to the normally closed contact of the switch 16 in parallel to the cold air forced convection fan motor 17.

21 is a defrosting control circuit, and 22 is a high frequency generator. The defrosting control circuit 21 controls the operating time of the high frequency generator.

The operation of the refrigerator with a high-frequency heating device configured as described above will be described below.

When the thawing chamber door is opened during thawing, switch 19 is set to 0F.
The energization to the FL high frequency generator 22 is stopped, and oscillation is stopped. In addition, when the refrigerator compartment door is opened, the switch 16 turns OFF L, and the fan motor 17 of the cold air circulation fan 7 turns off.
Then, the power supply to the high frequency generator 22 is stopped, the operation of the cool air forced convection fan motor 17 is stopped, and the oscillation of the high frequency generator 22 is stopped.

As described above, by connecting the switch 19, which opens the contact when the thawing chamber door is opened, to the normally closed contact of the switch 16 in parallel to the cold strong convection fan motor 17, the switch 1e can be connected to the door for preventing radio wave leakage. It can be used as a dual safety device that operates only by opening and closing.

Effects of the Invention As described above, the present invention provides a switch that is provided on the thawing chamber door and opens and closes the contacts of the switch in conjunction with the opening and closing of the thawing chamber door, and stops the oscillation of the high frequency generator when the door is opened, and a door of the refrigerator chamber. By installing a switch that opens and closes the contact of the switch in conjunction with the opening and closing of the door, and stops the oscillation of the fan motor of the cold air circulation fan and the high-frequency generator when the door is opened, this new method can be installed in the conventional refrigerator compartment door. This switch doubles as one of the dual safety devices that operates only when the door of the refrigerator door is opened and closed to prevent radio wave leakage, reducing the number of conventional comparison switches and stopping the oscillation of the high-frequency generator when the refrigerator compartment door is opened. Radio wave leakage to the outside can be prevented, improving safety.

[Brief explanation of drawings]

Fig. 1 is an electric circuit diagram of a refrigerator with a high-frequency heating device according to an embodiment of the present invention, Fig. 2 is a sectional view of a conventional refrigerator, and Fig. 3 is a sectional view of a conventional refrigerator.
The figure is an electrical circuit diagram of FIG. 2. 4...Defrosting chamber, 5...High frequency generator, 16...Switch, 17...Cold air forced convection fan motor, 19... ·switch. Name of agent: Patent attorney Toshio Nakao and one other name
1 Figure 16... Switch Figure 2 4... Defrosting chamber 5... High-dry liquid sales equipment Figure 3

Claims (1)

[Claims] A thawing chamber is installed inside the refrigerator, a high-frequency generator is installed outside the refrigerator, and a switch is installed at the door of the thawing chamber to open and close contacts in conjunction with the opening and closing of the thawing chamber door.When the door is opened, the high-frequency generator oscillates. and a switch provided on the door of the refrigerator compartment that opens and closes the contacts of the switch in conjunction with the opening and closing of the door, and when the door is opened, stops the fan motor of the cold air circulation fan and the oscillation of the high frequency generator. Refrigerator with high frequency heating device.